Relationship between Lateral Femoral Bowing and Varus Knee Deformity Based on Two-Dimensional Assessment of Side-to-Side Differences

Purpose: The objective was to evaluate the relationship between side-to-side differences of lateral femoral bowing and varus knee deformity based on two-dimensional (2D) assessment in unilateral total knee arthroplasty (TKA). Materials and Methods: A total of 143 patients with varus knee osteoarthritis who underwent unilateral TKA were enrolled. We evaluated the sideto- side differences of the frontal lower limb alignment by assessing lateral femoral bowing, anatomical medial distal femoral angle, and anatomical medial proximal tibial angle (aMPTA). Results: The average values of all anatomical indices were significantly different between the operated side and the non-operated side (p